I've made the project below, and it works. However, I'm confused about how it works, and why the diode is needed at all in this example. As I understand it, the left pin of the Transistor receiving the off/on signal from the Arduino turns the current between the other pins of/on (thus grounding the…

Diode / Transistor Confusion

LarryD October 31, 2017, 6:11am 3

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